From 873ff5501d8cd1a21045d6c1da34f0c3876bc235 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 13 Jan 2010 22:17:57 +0000 Subject: [PATCH] xfs: clean up log buffer writes Don't bother using XFS_bwrite as it doesn't provide much code for our use case. Instead opencode it and fold xlog_bdstrat_cb into the new xlog_bdstrat helper. Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder --- fs/xfs/linux-2.6/xfs_buf.h | 2 -- fs/xfs/xfs_log.c | 67 +++++++++++++++++++------------------- 2 files changed, 33 insertions(+), 36 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index a34c7b54822d..c20a76001867 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -408,8 +408,6 @@ static inline int XFS_bwrite(xfs_buf_t *bp) return error; } -#define XFS_bdstrat(bp) xfs_buf_iorequest(bp) - #define xfs_iowait(bp) xfs_buf_iowait(bp) #define xfs_baread(target, rablkno, ralen) \ diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 600b5b06aaeb..0d17516fbb13 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -50,7 +50,6 @@ kmem_zone_t *xfs_log_ticket_zone; (off) += (bytes);} /* Local miscellaneous function prototypes */ -STATIC int xlog_bdstrat_cb(struct xfs_buf *); STATIC int xlog_commit_record(xfs_mount_t *mp, xlog_ticket_t *ticket, xlog_in_core_t **, xfs_lsn_t *); STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, @@ -987,35 +986,6 @@ xlog_iodone(xfs_buf_t *bp) } /* xlog_iodone */ -/* - * The bdstrat callback function for log bufs. This gives us a central - * place to trap bufs in case we get hit by a log I/O error and need to - * shutdown. Actually, in practice, even when we didn't get a log error, - * we transition the iclogs to IOERROR state *after* flushing all existing - * iclogs to disk. This is because we don't want anymore new transactions to be - * started or completed afterwards. - */ -STATIC int -xlog_bdstrat_cb(struct xfs_buf *bp) -{ - xlog_in_core_t *iclog; - - iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *); - - if ((iclog->ic_state & XLOG_STATE_IOERROR) == 0) { - /* note for irix bstrat will need struct bdevsw passed - * Fix the following macro if the code ever is merged - */ - XFS_bdstrat(bp); - return 0; - } - - XFS_BUF_ERROR(bp, EIO); - XFS_BUF_STALE(bp); - xfs_biodone(bp); - return XFS_ERROR(EIO); -} - /* * Return size of each in-core log record buffer. * @@ -1158,7 +1128,6 @@ xlog_alloc_log(xfs_mount_t *mp, if (!bp) goto out_free_log; XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone); - XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb); XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1); ASSERT(XFS_BUF_ISBUSY(bp)); ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); @@ -1196,7 +1165,6 @@ xlog_alloc_log(xfs_mount_t *mp, if (!XFS_BUF_CPSEMA(bp)) ASSERT(0); XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone); - XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb); XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1); iclog->ic_bp = bp; iclog->ic_data = bp->b_addr; @@ -1343,6 +1311,37 @@ xlog_grant_push_ail(xfs_mount_t *mp, xfs_trans_ail_push(log->l_ailp, threshold_lsn); } /* xlog_grant_push_ail */ +/* + * The bdstrat callback function for log bufs. This gives us a central + * place to trap bufs in case we get hit by a log I/O error and need to + * shutdown. Actually, in practice, even when we didn't get a log error, + * we transition the iclogs to IOERROR state *after* flushing all existing + * iclogs to disk. This is because we don't want anymore new transactions to be + * started or completed afterwards. + */ +STATIC int +xlog_bdstrat( + struct xfs_buf *bp) +{ + struct xlog_in_core *iclog; + + iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *); + if (iclog->ic_state & XLOG_STATE_IOERROR) { + XFS_BUF_ERROR(bp, EIO); + XFS_BUF_STALE(bp); + xfs_biodone(bp); + /* + * It would seem logical to return EIO here, but we rely on + * the log state machine to propagate I/O errors instead of + * doing it here. + */ + return 0; + } + + bp->b_flags |= _XBF_RUN_QUEUES; + xfs_buf_iorequest(bp); + return 0; +} /* * Flush out the in-core log (iclog) to the on-disk log in an asynchronous @@ -1462,7 +1461,7 @@ xlog_sync(xlog_t *log, */ XFS_BUF_WRITE(bp); - if ((error = XFS_bwrite(bp))) { + if ((error = xlog_bdstrat(bp))) { xfs_ioerror_alert("xlog_sync", log->l_mp, bp, XFS_BUF_ADDR(bp)); return error; @@ -1502,7 +1501,7 @@ xlog_sync(xlog_t *log, /* account for internal log which doesn't start at block #0 */ XFS_BUF_SET_ADDR(bp, XFS_BUF_ADDR(bp) + log->l_logBBstart); XFS_BUF_WRITE(bp); - if ((error = XFS_bwrite(bp))) { + if ((error = xlog_bdstrat(bp))) { xfs_ioerror_alert("xlog_sync (split)", log->l_mp, bp, XFS_BUF_ADDR(bp)); return error;